Ibid.

Ibid., 36.

Charles Bamforth. «Scientific Principles of Malting and Brewing» (St. Paul, Minn.: American Society of Brewing Chemists. 2006): 36.

Sebastiaan Van Mulders et al. «The Genetics Behind Yeast Flocculation: A Brewer’s Perspective». In: Yeast Flocculation, Vitality, and Viability. Proceedings of the 2^nd International Brewers Symposium, Alex Speers, ed. (St. Paul, Minn.: Master Brewers Association of the Americas, 2012): 36.